氧化锌对微晶玻璃结构与性能的影响以及重金属锌的固化机制

李念哲; 张宇轩; 崔秀涛; 欧阳顺利

硅酸盐通报, 2023, 42 (11): 4136, 网络出版: 2023-12-11

氧化锌对微晶玻璃结构与性能的影响以及重金属锌的固化机制

Influence of Zinc Oxide on Structure and Properties of Glass-Ceramics and Solidification Mechanism of Heavy Metal Zinc

论文大纲

李念哲 ^1,*张宇轩 ¹崔秀涛 ¹欧阳顺利 ^1,2

作者单位

¹ 内蒙古科技大学材料与冶金学院, 包头 014010

² 广州航海学院, 广州 510725

微晶玻璃氧化锌重金属锌显微结构固化机制尖晶石 glass-ceramics zinc oxide heavy metal zinc microstructure solidification mechanism spinel

摘要

以分析纯试剂为原料模拟含锌冶炼渣, 采用熔融法制备微晶玻璃, 利用X射线衍射、扫描电子显微镜、拉曼光谱等表征方法, 探究不同氧化锌掺杂量对微晶玻璃形成、晶化及理化性能的影响。结果表明, 微晶玻璃的主要结晶相为堇青石相, 少量氧化锌(低于0.5%, 摩尔分数, 下同)的加入能够增强玻璃形成能力。随着氧化锌含量逐渐增加(0.5%~20.0%), 玻璃网络结构的完整性变差, 玻璃的黏度降低, 微晶玻璃的主要结晶相由堇青石转变为尖晶石, 同时结晶度和晶粒尺寸增大, 从而微晶玻璃的体积密度、硬度和耐酸碱性提高。微晶玻璃对重金属锌有较好的固化效果, 因此锌浸出浓度远低于标准值, 浸出率趋于稳定。本研究可为实现微晶玻璃固化重金属提供参考和借鉴。

Abstract

Using analytical pure reagents as raw materials to simulate zinc-containing smelting slagglass-ceramics were prepared by melting method. X-ray diffractionscanning electron microscopyand Raman spectroscopy were used as characterization methods, and the effect of different zinc oxide content on the formationcrystallizationphysical and chemical properties of glass-ceramics was explored. The results show that the main crystalline phase of glass-ceramics is cordieriteand the addition of a small amount of zinc oxide (less than 0.5%mole fractionsame as below) can enhance the glass-forming ability. As the zinc oxide content gradually increases (0.5%~20.0%)the integrity of glass network structure deterioratesand the viscosity of glass decreases. The main phase of glass-ceramics is transformed from cordierite to spineland the crystallinity and grain size of glass-ceramics increase. Consequentlythe bulk densityhardness and resistance to acid/alkali corrosion of glass-ceramics also increase. Heavy metal zinc has good curability in glass-ceramicsso the leaching concentration of zinc is much lower than the standard valueand leaching rate tends to be stable. This study provides a reference for the solidification of heavy metals through glass-ceramics.

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李念哲, 张宇轩, 崔秀涛, 欧阳顺利. 氧化锌对微晶玻璃结构与性能的影响以及重金属锌的固化机制[J]. 硅酸盐通报, 2023, 42(11): 4136. LI Nianzhe, ZHANG Yuxuan, CUI Xiutao, OUYANG Shunli. Influence of Zinc Oxide on Structure and Properties of Glass-Ceramics and Solidification Mechanism of Heavy Metal Zinc[J]. Bulletin of the Chinese Ceramic Society, 2023, 42(11): 4136.

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